File Info
| Exam | Java EE 7 Application Developer |
| Number | 1z0-900 |
| File Name | Oracle.1z0-900.Prep4Sure.2020-06-02.85q.tqb |
| Size | 2 MB |
| Posted | Jun 02, 2020 |
| Download | Oracle.1z0-900.Prep4Sure.2020-06-02.85q.tqb |
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Demo Questions
Question 1
You need to develop a chat application, which allows the display of emoticons and images together with text messages.
How should you configure a WebSocket endpoints to receive both text and binary messages?
- Create two @onMessage methods in the same endpoint with appropriate parameter types.
- Define the @onMessage methods in your endpoint with Object as parameter and check the actual type in your code.
- You can achieve this only by creating separate WebSocket endpoints for each message type.
- Create two @onMessage methods, each with appropriate decoder attribute in the same endpoint.
Correct answer: A
Question 2
Which interface should you implement if you want to be alerted to the lifecycle events surrounding your task being executed by a ManagedExecutorService?
- the Runnable Interface
- the ManagedExecutorTask interface
- the TaskEventListener interface
- the ManagedTaskListener interface
Correct answer: D
Explanation:
Reference: https://github.com/javaee/concurrency-ee-spec/blob/master/api/src/main/java/javax/enterprise/concurrent/ManagedExecutorService.java Reference: https://github.com/javaee/concurrency-ee-spec/blob/master/api/src/main/java/javax/enterprise/concurrent/ManagedExecutorService.java
Question 3
What is true about Message-Driven Beans (MDBs)?
- MDBs can participate in transactions.
- MDBs are invoked synchronously.
- Each MDBs can process messages only from a single client.
- MDBs retain data caches between client calls.
Correct answer: A
Explanation:
Reference: https://docs.oracle.com/javaee/7/tutorial/ejb-intro003.htm Reference: https://docs.oracle.com/javaee/7/tutorial/ejb-intro003.htm
